3-(aminoalkoxy)-2,3-dihydroquinobenzoxa or thia)zepine derivatives

ABSTRACT

3(-AMINOALKOXY)-2,3-DIHYDROQUINOBENZOXA (OR THIAA) ZEPINE DERIVATIVES ARE PROVIDED HAVING THE STRUCTURES   A&lt;(-CH2-((Y)N&#39;&#39;-1,2-PHENYLENE)-(4-(R1-N(-R2)-(CH2)N&#34;-O-),   WHEREIN A IS O OR S AND XX, Y, R1, N, N&#39;&#39; AND N&#39;&#39;&#39;&#39; ARE AS DEFINED HEREINAFTER. THESE COMPOUNDS ARE USEFUL AS ANTIINFLAMMATORY AGENTS, AND CENTRAL NERVOUS SYSTEM STIMULANTS OR DEPRESSANTS DEPENDING ON DOSAGE.   TETRAHYDROQUINOL-8,1-YLENE)-((X)N-1,2-PHENYLENE)-)   A&lt;(-CH2-(4-(R1-N(-R2)-(CH2)N&#34;-O-),(Y)N&#39;&#39;-1,2,3,4-   (X)N-1,2,3,4-TETRAHYDROQUINOL-1,8-YLENE)-) OR

3,809,698 Patented May 7., 1974 United States Patent Oflice 3,809, 98 J S-(AMINOALKOXYyLS-D DROQUINOBENZOXA R THIA) ZEPINE DERIVATIVES Harry L. Yale, New Brunswick, and Ramesh B. Pefigara,

Somerset, NJ., assignors to E. R. Squibb 8: Sons, Inc., Princeton, NJ. No Drawing. Filed Jan. 31, 1972, Ser. No. 222,286 Int. Cl. C07d 51/70 US. Cl. 260-268 PC 7 4 Claims ABSTRACT OF THE DISCLOSURE 3(-aminoalkoxy)-2,3-dihydroquinobenzoxa (or thia) zepine derivatives are provided having the structures A-on, (x) r@ (Y):

on N

k owns-imam:

wherein A is O or S and X, Y, R R, n, n and n" are as defined hereinafter. These compounds are useful as antiinflammatory agents, and central nervous systemstimulants or depressants depending on dosage.

The present invention relates to 3-aminoalkoxy-2,3-dihydroquinobenzoxa (or thia)zepine derivatives'of the structure 1 (mn I N Cit a i n-(ca l 2 2 n" 0' AI-CIH I 7 (X) N 2 1 n 0(cH ..-mz 11 wherein X and Y are thewsame or different and can be halogen, trifluoromethyl, lower alkyl, cycloalkyhlower alkylmercapto, lower alkoxy, cyano, isocyanido or dilower alkylsulfamoyl, A is O or S, n is 0, 1 or 2, n is 0, l or 2 and n" is 1 to 10, and pharmaceutically acceptable acid-addition salts thereof.

The term lower alkyl as employed herein includes both straight and branched chain radicals of up to and including eight carbon atoms, for instance, methyl, ethyl, propyl, isopropyl, butyl, s-butyl, isobutyl, pentyl, hexyl, isohexyl, heptyl, 4,4-dimethylpentyl, octyl, 2,2;4-trimetliylpentyl and the like.

'I'he' term halogen includes F, Cl, Br or -I.

The lower alkylmercapto groups contain up to eight carbon atoms and include methylmercapto, ethylmercapto, propylmercapto and mercapto radicals containing any of the lower alkyl groups mentioned hereinbefore.

The terms lower alkyloxy and lower alkoxy are interchangeable and refer to groups containing up to eight carbon atoms and which include any of the lower alkyl groups mentioned hereinbefore attached to an oxygen atom.

The term cycloalkyl includes saturated ring systems contain from three to seven carbons such as cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl and cycloheptyl.

The term alkenyl includes mono-unsaturated straight chain or branched chain radicals of less than eight carbons corresponding to lower alkyl as defined above.

In the above Formulae I and 11, each of the carbocyclic aromatic rings can include 0, l or 2 substituents, other than hydrogen. The nature and position of the substituents in the starting materials will determine which isomer, Type I and/or Type II, is obtained.

R and R may be the same or different and represent hydrogen, lower alkyl, aralkyl and alkenyl; NR R taken together is a heterocyclic radical having the formula in which X represents NR", 0, S or CH r represents 1, 2 or 3; R represents hydrogen, lower alkyl, hydroxy-lower alkyl, lower alkanoyloxy-lower alkyl, hydroxy-lower alkoxy-lower alkyl, di(lower alkyl)amino-1ower alkoxylower alkyl, lower-alkyla-mino-lower alkyl, di-lower akyl amino-lower alkyl, amino-lower alkyl; and R represents any of the R groups. These may be exemplified by piperidinyl; (lower alkyl)piperidjnyl [e.g., 2-, 3- or 4-(lower alkyl)piperidinyl]; (lower alkoxy)piperidinyl; pyrrolidinyl; (lower alkyl)pyrrolidinyl; (lower alkoxy)pyrrolidinyl; piperazinyl; (lower alkyl)piperazinyl (e.g., N methylpiperazinyl); di(lower alkyl)piperazinyl; (lower alkoxy)piperazinyl; (hydroxy lower alkyl)piperazinyl [e.g., N -(2-hydroxyethyl)piperazinyl]; (lower alkanoyloxyalkyDpiperazinyl [e.g., N (2 acetoxyethyDpiperazinyl]; (hydroxy-lower alkoxy-lower alkyl)piperazinyl [e.g., N -[2 (2 hydroxyethoxy)ethyl]piperazinyl]; di- (lower alkyl)amino-(lower alkoxy-lower alkyl)piperazinyl [e.g., N -[2-(Z-dimethylaminoethoxy)ethyl]piperazinyl]; homopiperazinyl; amino(lower alkyl)piperidinyl [e.g., 3 (aminoethyl)piperidinyl], lower alkylamino (lower alkyl)piperidinyl [e.g., 2-[(methylamino)ethyl] piperidinyl], di-lower alkylaminoflower alkyl)piperidinyl [e.g., 4-[dimethylamino(methyl)]piperidinyl].

The salts of the compounds of this invention include the acid-addition salts, particularly the non-toxic acidaddition salts. Acids useful for preparing the acid-addition salts, include, inter alia, organic acids, such as oxalic, maleic, fumaric, tartaric, citric, pamoic, acetic, and suc einic-acid.

As will be seen hereinafter, the compounds of the invention are prepared from starting materials of the struc- (III) /\N/\CH CH CHrC O OH 3 f Where in the starting material III, n is 1 or 2 and X includesa strongly" electronegative'group like trifiuoro methyl, cyano, isoeyanido or di-lower alkylsulfamoyl substituent at the 7-position, and n is 0, or Y is a substituent at a position other than 3 and 4 in the starting material, cyclization is directed to the 4-position so that the Type II isomer is subsequently formed. However, where X is an ortho-para orienting group like halogen, especially chlorine, and n is 1 or 2 and at least one halogen is at the 7-position of starting material III, or Y is'lower alkyl, lower alkyloxy, cycloalkyl or lower alkylmercapto at any position or a strongly electronegative group at a position other than 3, or when n is 0, a mixture of the Type I and Type II isomers is obtained.

Where in the starting material III, n is l or 2 and Y includes a strongly electronegative group like trifiuoromethyl, cyano or di-lower alkylsulfamoyl at the 3-position, and n is 0, or X is a substituent at a position other than 7 in the starting material, cyclization is direeted to the 6-position so that the Type I isomer is subsequently formed.

Where in the starting material III, 21' is l or 2 and Y includes an ortho-para orienting substituent at the 3-position, and n is 0, or X is a substituent at a position other than 7 in the starting material, cyclization is directed to the 6-position so that the Type I isomer is subsequently formed.

Where n and n are 0, that is where there are no substituents on either aromatic ring, the Type I isomer is obtained, that is IV) A-CH:

stituents such as lower alkyl, lower alkyloxy, cycloalkyl or lower alkylmercapto at the 2, 8 and/ or 9 positions, the Type I isomer is obtained.

Where the starting material does not include substituents at the 3 and/ or 7 positions, but does include strongly electronegative groups at the 1 and/or 9 positions, the Type I isomer is obtained. However, where the starting material includes a strongly electronegative group at the 2 and/or 8 positions, then a mixture of the Type I and Type H isomers is obtained.

Where X represents a strongly electronegative group like trifiuoromethyl, cyano or di-lower alkylsulfamoyl and n is 1 or 2 at least one X being at the 7-position of the starting material and Y is lower alkyl, lower alkylmercapto, cycloalkyl or lower alkoxy at any position or any of the above strongly electronegative groups at a position other than 3 in the starting material and n is 0, 1 or 2, the Type H isomer is obtained.

Where X is lower alkyl, lower alkyloxy, cycloalkyl, or lower alkylmercapto and n is l or 2 and Y is halogen, tritfiuoromethyl, cyano, isoeyanido "or di-lower alkylsulfamoyl, and n is 1 or 2 at least one Y being at the 3-position of the starting material, the Type I isomer is obtained. In this case, X can be trifluoromethyl or'other strongly electronegative group so long as it is not in the 7-position of the starting material as will be seen hereinafter.

Where X is loweralkyl, lower alkyloxy, cycloalkyl or lower alkylmercapto, and n is l or 2 and n in (Y),, is 0, the Type I isomer is obtained.

Where Y is lower alkyl, lower alkyloxy, cyeloalkyl or loweralkylmer'capto and n'is'l or2 and then in'"(X),',' is 0, the Type II isomer is obtained.

Where both X and Y represent lower alkyl, lower alkoxy and/or lower alkylmercapto, at least one of said groups being at the 3 and 7 positions of the starting material, the Type I isomer is obtained.

Preferred are those compounds of Formula I wherein n=0 and n'=0 and n" is 2 or.'3 and- A=0; those compounds of Formula I wherein n=0, n'=l and Y is Cl at the ll-posi'tion, and n=l, n=0 and n'" is 2 or 3 and X is Cl at 4-position and A=0 and those compounds of Formula II wherein n=l, X is CR; or Cl -at"the llpoistion, n=0, and A= 0. i

Compounds of the Formulae I and II can be preparedfrom VII or VIII obtained by reducing a 3-one of the structure PCB, 1 v.

A-CH,

by reacting it with any of the reducing agents, like lith ium aluminum hydride and preferably sodium borohy': dride, to form the corresponding 3-hydroxy compound of the structure The 3-hydroxy compound (VII or VIII.) is treated with a base such as sodium hydride or potassium hydride, in the presence of an aromatic hydrocarbon solvent such as benzene, toluene or xylene, at a temperature within the? range of from about 10 to about 130 C. and preferably from about 30 to about 110 C. and the resulting reaction mixture is reacted with a compoundof'the structure in an aromatic hydrocarbon solvent as describedabove verted to the corresponding 3-chloro compound by reacting them with anhydrous hydogen chloride in the presence of an anhydrous chloride salt, such as anhydrous barium chloride, anhydrous zinc chloride, or anhydrous calcium chloride, and a non-protic solvent such as any of those mentioned hereinbefore, to form the corresponding 3- chloro compound of the structure A-CH:

N CH l) .A-CH:

(XL: (Y)

The 3-chloro compounds of structures X and XI can be converted to compounds of Formula I or II of the invention by reacting them with a hydroxy alkyleneamine of the structure XII Compounds of Formula I or II can also be prepared by treating a 3-hydroxy compound (VII or VIII) with a base such as an alkali metal hydride, such as sodium hydride or potassium hydride, in the presence of an aromatic hydrocarbon solvent, such as benzene, toluene or xylene at a temperature within the range of from about to about 130 C. and preferably from about to about 110 C.; the reaction mixture is treated with a dihaloalkane of the structure (XIII) Hal(CI-I "Hal wherein Hal and Hal are different and can be I, Br, C1, or F, to form a compound of the structure A-CH:

( n I, or

N CH

A-CHz CH N k/ O(CH )w-Hal Compound XIV or XV is then reacted with an amine of the structure to form compounds of structures I or II.

The 3-one starting materials can be prepared by reacting a compound of the structure A-CH C N C wherein X, Y, n, n, and A are as defined hereinbefore, with a phosphorus pentahalide, such as phosphorus pentachloride, in a molar ratio of III: pentahalide of within the range of from about 0.9:1 to about 1:1, in the absence of oxygen, and in the presence of an inert solvent, such as benzene, toluene, xylene, etc., at a temperature within the range of from about 0 to about 50 C., to form an acyl halide of the structure (XVII) A-CH:

00.1% 3mm 0 N C I CHzCH: C-Hal The acyl halide XVII is reacted with anhydrous stannic chloride in a molar ratio of acyl halide XVII:stannic chlo ride within the range of from about 0.421 to about 1:1, at a temperature within the range of from about 20 to about 30 C. to form the Formulae V and VI, 3 or 3'- one compounds depending upon the nature and the position of the X and Y substituents.

The compounds of Formula V and/or VI can also be prepared by reacting the starting material A-CH:

C CH

N (3112011200 OH (III) The starting materials of Formula III are prepared by a sequence of reactions. First step comprises. reacting compounds having the Formula XVIII:

(XVIII) A-CH:

with aerylonitrile to yield compounds of Formula XIX wherein n, n, X, Y and A are as defined herein.

This reaction is carried out by employing an excess of the acrylonitrile as the solvent. The temperature utilized in the reaction can be varied from about to about 100 C. with the prefered range being between about 0 and about 75 C. This reaction proceeds expeditiously when a small amount (up to about 1%) of a strong base like sodium hydroxide, sodium methoxide, potassium tbutoxide, or preferably benzyl trimethylammonium hydroxide (Triton B) is used as the catalyst.

The next step for preparing compounds of Formula III is to treat the compounds of structure XXV with alcoholic hydrogen halide, such as hydrogen chloride in methanol, ethanol, and so forth, at room temperature whereby esters of the structure XX are formed.

(ll-13GB: C

wherein R is lower alkyl.

By saponifying compound XX with an alkali metal hydroxide, e.g., sodium hydroxide, potassium hydroxide, and so forth, the desired carboxylic acids of structure III can be recovered.

Examples of compounds of Formula XVIII where A is S are set out in US. Pats. Nos. 3,188,321 and 3,188,322.

Examples of compounds of Formula XD( where A is O or S can be found in a paper entitled Novel Polycyclic Heterocycles, by Yale et al., J. Med. Chem. 13, 713 (1970).

Examples of compounds of Formulae III, XIII, XIX and XX where A is 0 can be found in a paper entitled Novel Polycycle Heterocycles VII, by Petigara and Yale, J. Heterocyclic Chemistry, 8, 455 (1971).

Examples of starting materials which can be employed in preparing the compounds of the invention include, but are not limited to, the following wherein Acan be 0 or S.

A-CH;

HgCHaCO OH CHzCHzCO OH A CH: Cl (Cj/\ E CH OH CHICHI C O O H 01 cfr N/ o r- CHzCHQCO OH HaCHz C 0 OH A-CH: on

NSO g on N o (Bi l J E-01 O E 0 HIGH: C O OH /ACH2 C Fac EUR: 0 N OH I CHzCHzC O OH I CH CK; C O OH CHaCH: C O OH H CHaC O OH N HzCHz C O OH A-CH,

S OzN N 0 on, (II-11011: C 0 0H .cm .7 Fa

. C) 0 CF.

CH: S

A-CH:

A-CHI III C CHgCH: C O OH" A-oHi' I 4 I 01H,

c on

CH N CH HzCHZCOOH A-CH: I

I OH CHiCOOH on N JJHzCHzOOOH Compounds of this invention are therapeutically active compounds which are useful as central nervous system stimulants or depressants. depending upon dosage employed, or as anti-inflammatory agents. For these purposes, they may be administered orally or parenterally in such form as tablets, capsules, injectables, or the like by incorporating the appropriate dosage of the compound with carriers according to accepted pharmaceutical practices.

When the compounds of the invention are employed as central nervous system depressants, the dose for humans would be initially about '200 mg., administered two or three times daily. This level would be maintained for four to six days, and would then be increased to about 400 mg., two or three times daily, for complete therapeutic maintenance. When the compounds of the invention are employed as stimulants, the dose for humans would be initially about 2.0 mg., administered two to three times daily. This level would be maintained for four to six days, and would then be increased to about 40 mg., two or three times daily for complete therapeutic maintenance.

The compounds of this invention are also useful as antiinflammatory agents in warm blooded animals in a manner Similar to indomethacin. They may be used to decrease joint swelling, tenderness, pain and stiffness, in mammalian species, e.g., in conditions such as rheumatoid arthritis. A compound of Formula I or a physiologically acceptable salt (when applicable) of the character described above may be compounded according to accepted pharmaceutical practice in oral dosage forms such as tablets, capsules, elixirs or powders for administration of about mg. to 1 gm. per day in two to four divided doses.

They may also be used as surface disinfectants. About 0.01 to 1 percent by weight of any of these substances may be dispersed on an inert solid or in a liquid such as water and applied as a dust or spray. They may be incorporated also, for example, in a soap or other cleansing agent, e.g., a solid or liquid detergent, detergent composition, for example, in general cleaning, in cleaning dairy barns or equipment or cleaning food handling or processing equipment.

The following examples illustrate the present invention without, however, limiting the samev thereto. All temperatures are expressed in C.

EXAMPLE 1 2,3-dihydro-3-[3-(4-methyl)-1-(piperazinyl)propoxy]-l1- (trifluoromethyl)-1H,7H quino[-8,1 cd] [1,5]benzoxazepine maleate salt (1 :2)

7-(trifluoromethyl)-5,1l dihydrodibenz[b,e] [l,4]oxazepine-S-propionitrile, 15.0 g., is dissolved in 240 ml. of dry dioxane and to this 140 ml. of 30% methanolic hydrogen chloride is added. The solution is stirred for 36 hours; 6 ml. of H 0 is added, stirred 0.5 hour, and then concentrated in vacuo to ml. The solid is filtered, and the filtrate is concentrated to dryness in vacuo. The residual liquid is taken up in 200 ml. of diethyl ether, treated with Darco and Hyflo, the diethyl ether solution concentrated and the residue distilled in vacuo to give 13.1 g. 5,11-dihydro-7-(trifluoromethyl)dibenz[b,e] [l,4]oxazepine 5- propionic acid, methyl ester, B.P. about 166-168 (0.08 mm.), M.P. about 70.0-71.5".

7- (trifluoromethyl -5, 1 1 dihydrodibenz [b,e] [1,4] oxazepine-S-propionic acid, methyl ester, 3.15 g., is dissolved in 315 ml. of methanol and to this 0.5 g. of potassium hydroxide dissolved in 25 ml. of water is added. The mixture is refluxed for 2.5 hours and then concentrated in vacuo. The residue is taken up in 250 ml. of water and this solution is acidified with 2% aqueous HCl to give 5,11-dihydro-7 (trifiuoromethyl)dibenz[b,e] [1,4]oxazepine-S-propionic acid, M.P. about 105107 C. l

(B) 1,2-dihydro-l 1- trifluoromethyl) -3 H,7H-quino [8, 1-c,d] [1,5]benzoxazepin-3-one: A solution of 6.86 g. of 5,11-dihydr-7 (trifluoromethyl) dibenz[b,e] [1,4] oxazepine-S-propionic acid in 50 ml. of benzene is cooled to 5 To this is added dropwise with stirring a solution of 4.6 g. of P01 in 25 ml. of benzene over a period of minutes. The solution is stirred at 25 for 40 minutes and then at 40-50 for another minutes. The reaction mixture is then heated at 55 for 10 minutes, cooled to 10 and to this is added dropwise with stirring a solution of 12.0 g. anhydrous stannic chloride in 20 ml. of benzene. After stirring 20 minutes at 10 and 20 minutes at room temperature, 100 ml. of ether are added, followed by 10 ml. of concentrated hydrochloric acid, and then 100 m1. of water. After stirring vigorously for 10 minutes, the organic phase is separated, and the aqueous phase is extracted with 100 ml. of ether. The combined organic extracts are washed, dried, filtered, and concentrated to dryness to give 6.9 g. of residue; this is crystallized from 2-propanol to give 4.3 g. of product, M.P. about 140142.

(C) 2,3-dihydro-1 1- (trifluoromethyl) lH,7H-quino- 8, l-cd] [1,5]benzoxazepin-3-ol: A solution of 9.6 g. of 1,2- dihydro-l1-(trifluoromethyl)-3H,7H-quino[8,1 cd] [1,5] benzoxazepin-B-one in 200 ml. of dioxane is cooled to 10, and to this is added a cold solution of 1.2 g. of sodium borohydride in 60 ml. of aqueous dioxane, within 3 minutes. After the addition, the reaction mixture is stirred for 1 hour at room temperature, and then heated on a steam bath. When the temperature reaches 6'065, the color of the reaction mixture fades and becomes colorless. It is cooled to 10 and to this is added 1000 ml. of cold 2% aqueous hydrochloric acid while stirring. The resultant white solid is filtered, washed with 200 ml. of water, and dried to give 9.3 g. of an off-white solid, MJP. about 120- 124. It is recrystallized twice from a mixture of 50 ml. of benzene and 150 ml. of cyclohexane, to give 8.6 g. the desired carbinol, which melts at about 127-129.

(D) 2,3 dihydro-3-[3 (4 methyl-l-piperazinyl)propoxy] 11 (trifluoromethyl) 1H,7H quino[8,1 cd] [1,5]benzoxazepine, maleate salt (1 :2): To a solution of 5.8 g. of 2,3-dihydro-1l-(trifluoromethyD-lH,7H-quino [8,1-cd] [l,5]benzoxazepin-3-ol in 100 ml. of toluene while stirring, is added 1.0 g. of NaH (50% suspension in mineral oil). Vigorous effervescence of H is noticed. The reaction mixture is gently heated under reflux for 45 minutes, then cooled to 10 and to this, is added dropwise, a solution of 3.9 g. of l-(3-chloropropyl)-4=methylpiperazine in 20 m1. of toluene. The reaction mixture is heated under reflux for 5 hours. Next day, it is filtered and the filtrate concentrated to dryness in vacuo. This gives 9.0 g. of viscous liquid that is dissolved in 200 ml. of warm absolute EtOH, and to this is added a solution of 4.6 g. of maleic acid in 15 ml. of absolute EtOH. Spontaneous precipitation occurs; the mixture is treated with 600. ml. of anhydrous Et O and the solid filtered with suction to give 12.1 g. of product, M.P. about 1-65-170. This is recrystallized from 1100 ml. of absolute EtOH, to give 8.3 g. (66% yield) of the product, M.P. about 170.5- 172.5

1 2 EXAMPLE 2 3 [2 (dimethylamino)ethoxy] 2,3 dihydro 11 (trifiuoromethyl) 1H,7II quino[8,1-cd] [1,5]benzoxazepine, oxalate salt (1:1)

The procedure described in Example 1 is followed in this preparation, using 6.4 g. of 2,3-dihydro-11- (trifluoromethyl) 1H,7H quino[8,1-cd] [l,5]benzoxazepin-2-ol, ml. of toluene, 1.5 g. of NaH and a solution of about 4.3 g. of 2-(dimethylamino)ethyl chloride in 20 m1. of toluene. Work up of the reaction mixture gives 8.3 g. of viscous liquid residue of the base that does not solidify. This residue is dissolved in a mixture of 25 ml. of absolute EtOH and 50 ml. of anhydrous EtOH and 50 ml. of anhydrous Et- O and'to the solution is added a solution of 2.0 g. of oxalic acid in a mixture of 7 ml. of absolute EtOH and 40 ml. of anhydrous Et o (ethyl ether). The solid is filtered and dried to give 6.6 g. of a product, M.P. about 86-95 dec. This is recrystallized from a mixture of EtOH-Et O to give 4.4 g. of the product, M.P. about 88-96. This 4.4 g. of the product is dissolved in ml. of boiling Z-butanone, the solution treated with 1.0 g. of Dame and filtered; the filtrate concentrated under reduced pressure to 40 ml. and cooled. The crystalline solid is filtered, and dried in vacuo at 75 over P 0 for about 6 hours to give 2.6- g. of the product, M.P. about 143 dec. (sintering at 120).

EXAMPLE 3 3 [3 (dimethylamino)propoxy] 2,3 dihydro ll-(trifluoromethyl) 1H,7H quino[8,1 cd] [1.5]benzoazepine, maleate salt (1:1)

The procedure of Example 1 is employed substituting 3-(dimethylamino)propyl chloride for 3 (4 methyl-1- piperazinyl)propylchloride to prepare the title compound M.P. about Ill-113 dec.

EXAMPLE 4 11 chloro 2,3 dihydro 3 [3- (piperidinopropoxy)]- 1H,7H quino[8,1-cd] [l,5]benzoxazepine maleate salt 1 1) (A) 7 chloro 5,11 dihydro-dibenz[b,e] [1,4]oxazepine-S-propionic acid: To 50.0 g. of 7-chloro-S,11-dihydrodibenz[b,e] [1,4]oxazepine in 60 ml. of redistilled acrylonitrile is added in 5 minutes 0.80 ml. of Triton B. Subsequently, the mixture is heated for one hour under reflux and the product isolated by extraction with benzene to give 7-chloro-5,1 ldihydro-dibenz[b,e] 1,4] oxazepine-S- propionitrile, M.P. about 13l-132.

7 chloro 5,11 dihydrodibenz[b,e] [1,4]oxazepine-5- propionitrile, 15.0 g., is dissolved in 240 ml. of dry dioxane and to this 140 ml. of 30% methanolic hydrogen chloride is added. The solution is stirred for 36 hours; 6 ml. of B 0 is added, stirred 0.5 hour, and then concentrated in vacuo to 120 ml. The solid is filtered, and the filtrate is concentrated to dryness in vacuo. The residual liquid is taken up in 200 ml. of diethyl ether, treated with Dame and Hyflo, the diethyl ether solution concentrated and the residue distilled in vacuo to give 7-chloro-5,11-dihydrodibenz[b,e] [l,4]oxazepine-5-propionic acid, methyl ester, M.P. about 7072.

7 chloro- 5,11 dihydrodibenz[b,e] [1,4]oxazepine-5- propionic acid, methyl ester, 3.15 g., is dissolved in 315 ml. of methanol and to this 0.5 g. of potassium hydroxide dissolved in 25 m1. of water is added. The mixture is refluxed for 2.5 hours and then concentrated in vacuo. The residue is taken up in 250 ml. of water and this solution is acidified with 2% aqueous HCl to give 7-chloro-5,l1- dihydro dibenz [b,e] [1,4]oxazepine 5 propionic acid, M.P. about -157".

(B) 11 chloro 1,2 dihydro-3H,7H quino[8,1-cd] [1,5]benzoxazepin-3-one: A solution of 6.86 g. of 7-chloro 5,11 dihydro-dibenz[b,e] [l,4]oxazepine--propionic acid in 50 ml. of benzene is cooled to 5-10". To this is added dropwise with stirring a solution of 4.6 g. of PCl in 25 ml. of benzene over a period of 15 minutes. The solution is stirred at 25 for 40 minutes and then at 40-50 for another 20 minutes. The reaction mixture is then heated at 55 for minutes, cooled to 10 and to this is added dropwise with stirring a solution of 12.0 g. anhydrous stannic chloride in 20 ml. of benzene. After stirring 20 minutes at 10 and 20 minutes at room temperature, 100 m1. of ether are added, followed by 10 ml. of concentrated hydrochloric acid, and then 100 ml. of Water. After stirring vigorously for 10 minutes, the organic phase is separated, and the aqueous phase is extracted with 100 ml. of ether. The combined organic extracts are washed, dried, filtered, and concentrated to dryness to give 6.9 g. of residue; this is crystallized from 2-propanol to give 4.3 g. of product, M.P. about 140-142.

(C) 11 chloro 2,3 dihydro-1H,7H-quino-[8,1-cd] [1,5] benzoxazepin-S-ol: A solution of 9.2 g. of ll-chloro- 1,2 dihydro 3H,7H-quino[8,1-cd] [1,51benzoxazepin-3- one in 200 ml. of dioxane is cooled to 10, and to this is added a cold solution of 1.2 g. of sodium borohydride in 60 ml. of 25% aqueous dioxane, within 3 minutes. After the addition, the reaction mixture is stirred for 1 hour at room temperature, and then heated on a steam bath. When the temperature reaches 60-65, the color of the reaction mixture fades and becomes colorless. It is cooled to 10 and to this is added 1000 ml., of cold 2% aqueous hydrochloric acid while stirring. The resultant white solid is filtered, washed with 200 ml. of water, and dried to give 8.5 g. of an oil-white solid. It is recrystallized twice from a mixture of 50 ml. of benzene and 150 m1. of cyclohexane, to give 7.7 g. of the desired carbinol.

(D) 3,11-dichloro-2,3-dihydro 1H,7H-quino-[8,1-cd] [1,5] benzoxazepine: To a solution of 6.0 g. of 11- chloro 2,3 dihydro-1H-7H-quino[8,1-cd] [1,5]benzoxazepin-3-ol, in 100 ml. of benzene is added 4.0 g. of anhydrous calcium chloride and into this is slowly bubbled dry hydrogen chloride. The mixture is filtered and the filtrate is concentrated to dryness under reduced pressure to give 5.86 g. of solid. This is recrystallized from petroleum ether (30-60"), to give 4.6 g. of the product.

(E) 1 1-chloro-2,3-dihydro-3-[3-(piperidinopropoxy) 1H,7H quino[8,1 cd] [1,5]benzoxazepine, maleate salt (1:1): To a solution of 2. 86 g. of S-piperidinopropanol in 100 ml. of toluene is added 1.1 g. of NaH (50%) and the mixture is heated under reflux for 30 minutes. This is then cooled to 10 and to it is added dropwise a solution of 3.4 g. of 3,1l-dichloro-Z,3-dihydro-1H,7H-quino- [8,1-cd] [1,5]benzoxazepine in 34 ml. of toluene. The mixture on similar work up as in Example 1 gives the desired product.

EXAMPLE 5 4-chloro-2,3-dihydro-3-[ 3- (4-hydnoxyethyl) -l-(piperazinyl) propoxy]-1H,8H-quino[1,8-ab] [4,1]benzothiazepine, maleate salt (1 l) (A) 4 chloro 1,2 dihydro-3H,8H-quino[1,8-ab] [4,1]benzothiazepin-3-one: To a suspension of 18.0 g. of 7 chloro 5,11-dihydrodibenzo[b,e] [l,4]thiazepine in 35 ml. of acrylonitrile, cooled to 0-5, is added with stirring 0.2 ml. of Triton B. The suspension becomes homogeneous, the temperature rises to 10, and a red solution results. This is allowed to come to 20 and is then heated under reflux for one hour. The excess of acrylonitrile is removed by distillation and the residue is extracted with 5-400 ml. portions of diethyl ether. The diethyl ether extracts are dried and concentrated to about 250 ml., and the colorless product is filtered. The filtrate is concentrated and the resulting solid is again filtered. The yield of the combined solids, 7-chloro-5,1l-dihydrodibenzo[b,e]- [1,4] thiazepine-S-propionitrile, is about 22.0 g.

The 7 chloro-5,11-dihydrodibenz[b,e] [l,4]thiazepine- 5-propionitrile, 71.0 g., is dissolved in 1200 ml. of dry dioxane and to this 800 ml. of 30% methanolic hydrogen chloride is added. The solution is stirred at 20 for 72 hours, 30 ml. of water is added, the mixture is stirred for 0.5 hour, concentrated in vacuo to about 400 ml., filtered, and the filtrate concentrated to dryness in vacuo to yield 67.5 g. of methyl,7-chloro-5,ll-dihydrodibenzo- [b,e] [1,4] thiazepine-S-propionate.

The methyl, 7 chloro '5,11-dihydrodibenzo[:b,e] [1,4] thiazepine-S-propionate, 25.0 g., is dissolved in 2200 ml. of methanol and to this is added a solution of 5.6 g. of potassium hydroxide in 300 ml. of water. The solution is heated under reflux for 4 hours, concentrated in vacuo, the residue is dissolved in 600 ml. of water, the solution cooled, and then acidified with 2% aqueous hydrochloric acid. The solid is filtered and dissolved in 600 ml. of benzene. This solution is decolorized and then extracted with 600 ml. of 2% aqueous sodium hydroxide solution. The aqueous extract is acidified with 2% aqueous hydrochloric acid. The solid is filtered and recrystallized from benzene. The yield of 7-chloro-5,1l-dihydrodibenzo[b,e] [1,4]thiazepine-5-propionic acid is about 22.0 g.

A solution of 7.55 g. of 7-chloro-5,ll-dihydrodibenzo- [b,e] [1,4]thiazepine-5-propionic acid in 40 ml. of warm benzene is slowly cooled to 35 and while stirring 5.3 g. of trifluoroacetic anhydride is added dropwise. The reaction mixture is heated under reflux for 5 minutes, 50 ml. of benzene is added, and the solution is poured into cold water. The benzene layer is separated, the aqueous phase is extracted with 50 ml. of benzene, and the combined benzene extracts are concentrated to dryness in vacuo. The residue, 7.0 g., M.P. about -120, is dissolved in 325 ml. of a boiling mixture of 2-propanol and cyclohexane (2:3), and then kept at 20 to give two diflerent types of crystals. These are filtered and the yellow transparent rhombic crystals (Compound I) are separated from the darker yellow flat needles (Compound II).

Compound I is recrystallized from 2-propanol-cyclohexane (1:4) to give 2.2 g. of 11-chloro-l,2-dihydro-3H, 7I-I-quino- [8,1-cd] [1,51benzothiazepin-3-one.

Compound II is recrystallized from 2-propanol-cyclohexane (1:4) to give about 2.6 g. of 4-chloro-1,2-dihydro- 3H,8H[ 1,8-ab] [4,1]benzothiazepin-3-one.

4 chloro 2,3-dihydro-lH,8H-[l,8-ab] [4,1]benzothiazepin-3-ol.

By following the procedure described in Example 4(C), using 10.0 g. of 4- chloro 2,3-dihydro-1H,8H-[1,8-ab] [4,1]benzothiazepin-3-one, and 1.3 g. of NaBI-I there is obtained 8.2 g. of the desired benzothiazepin-3-ol.

(B) 4 chloro 2,3-dihydro-3-[3-(4-hydroxyethyl-1- piperazinyl) propoxy]-lH,8H-quino[1,8-ab][4,11benzothiazepine, maleate salt (1:1): To a solution of 5.5 g. of 4 chloro 2,3-dihydro-1H,8H-quino-[1,8-ab] [4,1]benzothiazepin-3-ol in 100 ml. of toluene is added 1.0 g. of NaH (50% and the mixture is heated under reflux for 45 minutes, then cooled to 10. To this is added dropwise, a solution of 3.9 g. of l-bromo-3-chloropropane and the mixture is heated under reflux for 6 hours. This is cooled, filtered and concentrated to dryness in vacuo to give 5.7 g. of the crude 4-chloro-2,3-dihydro-3-(3-chloropropoxy) 1H,8H-quino[1,8-ab] [4,1]-benzothiazepine, as a viscous oil. This oily residue is dissolved in ml. of 2-PrOH and to it are added 3.0 g. of NaI and 5.2 g. of l-piperazineethanol. The reaction mixture is heated under reflux for about 20 hours, washed and then concentrated to dryness in vacuo. The residue is converted to the maleate salt and is recrystallized from 2-PrOH.

EXAMPLES 6 TO 20 Employing the procedure described in Example 1(A), 1(B), 1(C) but substituting the starting material shown in column A of Table I below, the 3-01 in column B is obtained; employing the procedure of 1(D) but subamine shown in column C, the product shown in column stituting the-3-ol shown in columnB and the haloalkylene D is obtained.

TABLE I.

- Column A Column B Exnmple number Starting material 3 or 3'-ol 6 S-CH, v SCH1 I Q T N CH Fag OH N JH CHz C 0 0 H 7.-.:..' O-CH:

' F30 0 0 -OCH; FaC- 0 OCH: CH 1 H J CH N CHaCHICOOH i v OH 8 /OCH: O-GH:

N C N C C H N CH N OH I CHaCHzCO OH 9 S-CH; S

HO HO cm s 0 0 S 0 /N02 /NO2 H30 H N CH H3O CH N JH CHQCOOH k/OH S- CH; S- 2 0 0 H30 N H H I 12 s-cm I /SCH:

@ J- H\N H i I 4 \N/ H 13 Same as above Same as above m "n 21 22 TABLE I.Coutlnued Column 0 Column D Example number Hal(CH:)."NR R' Product 14 Cl- (CH2) r-NS CHfi) H N L I k :)r--N 0 (CH1) :N (Gila-04H) CHI SCrHl S-CH,

O N-(CHahO CH: XCHahN EXAMPLES 21 10 30 Employing the procedure described in Example 4(A),

shown in column A of Table 11 below, the 3-chloro icompound in column B is obtained; by reacting the B-chloro compound with the hydroxyalkylene amine shown in 4(B), 4(C), 4( D), but subs tituting starting material 75 column C, the product shown in column Dis obtained.

27 EXAMPLES 31 I 45 Employing the procedure of Example 5, substituting the starting materials of Examples 6 to 20 and'reacting them with the following reactants, as per Example (B), set out in Table III below, the products of Examples 31 to 45 are obtained.

Following the procedure of Examples Sl m 45, employing as the starting materials BKCHQICI and rm n-omcmon the product obtained has the structure Fa IN I EXAMPLE 47 Following the procedure of Examples 31 to 45, employing as starting materials N Fae f Br(CH;)Cl and HN N-cn cmocmcmon the product obtained has the structure oomcmocmcmofl What is claimed is: 1. A compound having the structure 2. A compound having the structure O' QH.

Leo x (GHflw-N NR4 I wherein Xis trifiuor omethyl or chloro, n" is 2 or 3, and R is selected from thegroup consisting of hydrogen, lower alkyl, hydroxy lo'wer alkyl, lower alkanoyloxy-lower alkyl, hydroxy-lower alkoxy-lower alkyl, amino-lower alkyl, lower alkylamino-lower alkyl, di-lower alkylaminolower alkyl and di(lower akyl) amino-lower alkoxy-lower alkyl; wherein lower alkyl refers to an alkyl group having up to eight carbon atoms; or a non-toxic acid-addition salt thereof.

3. A compound in accordance with claim 2 having the structure 4- A compound in accordance with claim 1 having the structure References Cited UNITED STATES PATENTS DONALD G. DAUS, Primary Examiner U.S. Cl. X.R.

260239 BC, 283 S, 283 SA, 283 SY, 289 R, 293.57, 293.58, 326.81, 327 B, 333; 424250, 258

end-Rebe Said Patent No. 6'98 my -UNITED STATES PATENT OFFICE QERTEFICATE GE QRRECTION Dated 7,

Inventor-(s) Harry L. Yale and Ramesh B. Petigara It is certified that error appears in the above-identified patent I rs Patent; are hereby corrected as shown below:

V I v V V In the title; inserta left parenthesis "before: "OR THIA)" Column 6, lines37, r0140, formula V, that portion reading: 7

Colmm 7,.v line 27, the word "prefered" should be: preferred should be:

Column7, lines 40 to 49, formula XX, that portion reading:

- I jn should be'r' (in Column 16, Example 8, Column B, that portion of the formula reading: v n

O-CH

' Column 22, Example 1?, Column .D, that portion of the formula reading:

should be: 5

Part 2 of 3 p v a QA49 53x 3? 'uwn'm STAKES PAiENT OFFICE v CERTEFECATE OF ORRECTION Patent 5, 3,809,698 '2 Ma 1974 Inventor(s) Harry L. Yale a nd- Ramesh B. P etigara A, It is cert'lfiefi that: error appears in the above identified "patent flag-1d that sale Let-temfeeent are hereby corrected as Shawn below:

calm-1 Column 25, Example 26, Colman C, the formula that reads:

'2 3" 1 should be: H0(CH -N' I Column 25, Example 27, ColumniD tha t'pe rtion of the formula that reads:

n Y Q I n should be:,- i}

- 27, Example 41, line-39, 'Columh NHR R- delete the words:

Xf's ame as above'f; and:- insert nthe following:

JCelumnZT, 'Exemple 46, lines 55 120 60,,the portion of the '1 J I 'formgla that reads'i 3 p should be: I l

722253? I Q 4 fiNITED STATES PATENT )F FICE CERTIFICATE OF CORRECTION mventofls) Harry L. Yale and Ramesh B. Petigara It is c ertified that error appears in the shove-identified patent and that saidfLettsrs'Patent are hereby corrested as shown below} Column 23-,- Clai 2,"'th'at portion the formula reading:

should be:

- Signed" and, sealed this 22nd day of October 1974.

' 'Attest:

MQCOYM GIBSON JR. c. MARSHALL DANN I Attes'ting Officer I Commissioner of Patents 

